Stigma (stigma). The uppermost, papillose part of the pistil, which receives the pollen.
Stipel (stipella). A stipule at the base of a leaflet of a compound leaf.
Stipule (stipula). A leaf-or scale-like appendage of the leaf-base.
Striate (striatus). Marked with longitudinal lines.
Strophiole (strophiolus). Caruncle, i.e., an outgrowth near the hilum of certain seeds.
Style (stylus). The narrowed part of the pistil, intermediate between the ovary and the stigma.
Sub- (sub-). Under; or almost, somewhat; e.g., subsessile = almost sessile.
Subtend (subtendere). Extend under; especially: bear in its axil.
Subulate (subulatus). Awl-shaped, i.e., very narrow and pointed.
Suffruticose (suffruticosus). Woody at the base, herbaceous above.